Unresponsive and not delivering on promises

I bought a used vehicle from this group on the 6th of February. I haven't experienced any joy on this vehicle. Firstly the battery gave a problem that they sorted out. The vehicle stalls before pulling away and we had our own diagnostic done as they said nothing was wrong and we picked up 3 faults in the car. My car has been there for a week and I am constantly following up,on Monday the workshop manager was going to test drive the car,yesterday as well and I was going to receive a call till now,no feedback. The gentleman Leon who assisted me also doesn't seem to care. Worst service ever and won't refer anyone to them.

Miss Smith ***